Hughes Aircraft Company

Theodore S Fishkin

Peter Dimitrijevic

Mon N Wong

Donald C Chang

Robert J Patin

Gilbert C Garcia

Timothy A Crail

Larissa Domnikov

James A Patrick

David T La Flame

A one-piece gasket is used between millimeter waveguide sections to prevent energy leakage from the joint. The gasket consists of an electrically conductive elastomeric ring filled with metallic particles, a conformable metallic inner shield on the inner periphery of the ring, and a conformable metallic outer shield on the outer periphery of the ring. The gasket is conveniently prepared by casting the filled elastomer in place between the shields.

Emi suppression gasket for millimeter waveguides

A high speed wide dynamic range variable rate power detector which provides an output signal linearly proportional to the input power level. The invention operates essentially independently of the system computer and provides a gain measurement system effective in the testing of an antenna in a frequency hopping mode. The illustrative embodiment includes a first subcircuit for down converting an RF input signal to a fixed intermediate frequency signal; a second subcircuit for converting the intermediate frequency signal to a DC signal; a third subcircuit for varying the rate of conversion of intermediate frequency signals to DC signals and a fourth subcircuit for providing an output signal which is proportional to the log of the DC signal.

High speed wide range variable rate power detector

An improved antenna test and measurement system including a transmit antenna; means for providing a test signal to said transmit antenna and initiating the transmission thereof; a receive antenna adapted to receive the test signal as transmitted by said transmit antenna; an amplitude detector for detecting the amplitude of the received test signal; and an open loop phase detector for measuring the phase of the received test signal relative to a reference signal.

Antenna test and measurement system

An assembly of waveguides and coupling apertures located within walls separating the waveguides is formed within a planar configuration. The coupling apertures are arranged either singly or in pairs, with one coupling aperture behind the other coupling aperture, to provide for a division of power between waveguides and to provide for a crossing over of power from one waveguide to another waveguide. The waveguide assembly is reciprocal in operation so that the single coupling apertures may be employed for a distribution as well as for a combination of electromagnetic waves. Phase shifters may also be included to provide a desired phase relationship among waves outputted by various ones of the waveguides. The waveguides, the walls separating the waveguides, the coupling apertures and the phase shifters may all be fabricated in a parallel array within a common metallic plate by automated milling machines for facile, accurate, and reproducible manufacture of the wavguide assembly. The waveguide assembly including the matrix of passages for electromagnetic waves is readily structured to serve as a Butler matrix.

Waveguide matrix including in-plane crossover

A test and measurement system for space satellite antennas which includes frequency synthesizers which are capable of shifting from frequency to frequency at high speeds with precision accuracy to provide source and reference frequencies with which the antennas may be tested; a transmitter utilizing one of the frequency synthesizers to generate test signals; an optional power monitor receiving antenna; a non coherent receiver utilizing the other of the frequency synthesizers to generate local reference frequency signals; high speed electronic switching networks connecting the various antennas to be tested with the receiver at the receiving antenna; a network for converting received signals to digital signals and storing those signals; and a computer system for controlling the transmitter, the receiver, and the switching systems, and the data converting and storage network.

Growing community of inventors

Lawndale, CA, United States of America

Theodore S Fishkin